var speed = 50
var s = 20
var l = 333
document.write("<form name='btn'><input type='button' "
+"name='sc' value='"+ msg +"'></form>")
function btnsc() {
document.btn.sc.value = msg.substring(s,l) + msg.substring(0,s)
s++
if (s >= l) {
s = 0
}
setTimeout("btnsc()",speed)
}
btnsc();
//-->